| 1 |
The speed of sound through Iron. |
- A. 340 meter per second
- B. 1500 meter per second
- C. 5000 meter per second
- D. 500 meter per second
|
| 2 |
____________ light is the reiurs of light when it hits as opaque surface. |
- A. Refraction
- B. Reflection
- C. Dis persion
- D. Echo
|
| 3 |
Which of the following sounds is called noise. |
- A. Sound of a flute
- B. Rusting of leaves
- C. Pressure horn
- D. Chirping of birds
|
| 4 |
Which object reflect maximum light. |
- A. White paper
- B. Coloured paper
- C. Mirror
- D. Brick wall
|
| 5 |
Which things are not transparent objects. |
- A. wood
- B. Metal
- C. Stone
- D. All of these
|
| 6 |
The light from the sun reaches on the earth |
- A. 5 min
- B. 8 min
- C. 10 min
- D. 15 min
|
| 7 |
Sound is a type of energy. |
- A. Electrical
- B. Mechanical
- C. Thermal
- D. Chemical
|
| 8 |
The speed of sound through air. |
- A. 340 meter per secod
- B. 1500 meter per second
- C. 5000 meter per second
- D. 500 meter per second
|
| 9 |
Non -illuminated object that are illuminated by heating are called. |
- A. Transparent object
- B. Opaque object
- C. Burning object
- D. Semi transparent
|
| 10 |
Which things are transparent object. |
- A. Water
- B. Glass
- C. Air
- D. All of these
|